yacas-gui: drop

Upstream is planning deprecation of the gui entirely, see https://github.com/grzegorzmazur/yacas/issues/361.

pkgs/by-name/ya/yacas/package.nix

@@ -5,7 +5,6 @@
   fetchpatch,
   cmake,
   perl,
-  enableGui ? false,
   enableJupyter ? true,
   boost,
   jsoncpp,
@@ -14,7 +13,6 @@
   enableJava ? false,
   openjdk,
   gtest,
-  libsForQt5,
 }:
 
 stdenv.mkDerivation (finalAttrs: {
@@ -31,7 +29,7 @@ stdenv.mkDerivation (finalAttrs: {
   hardeningDisable = [ "format" ];
 
   cmakeFlags = [
-    "-DENABLE_CYACAS_GUI=${if enableGui then "ON" else "OFF"}"
+    "-DENABLE_CYACAS_GUI=OFF"
     "-DENABLE_CYACAS_KERNEL=${if enableJupyter then "ON" else "OFF"}"
     "-DENABLE_JYACAS=${if enableJava then "ON" else "OFF"}"
     "-DENABLE_CYACAS_UNIT_TESTS=ON"
@@ -66,11 +64,6 @@ stdenv.mkDerivation (finalAttrs: {
   ];
   buildInputs = [
   ]
-  ++ lib.optionals enableGui [
-    libsForQt5.qtbase
-    libsForQt5.wrapQtAppsHook
-    libsForQt5.qtwebengine
-  ]
   ++ lib.optionals enableJupyter [
     boost
     jsoncpp

pkgs/top-level/aliases.nix

@@ -2498,6 +2498,7 @@ mapAliases {
   xxHash = warnAlias "'xxHash' has been renamed to 'xxhash'" xxhash; # Added 2026-02-12
   yabar = throw "'yabar' has been removed as the upstream project was archived"; # Added 2025-06-10
   yabar-unstable = throw "'yabar' has been removed as the upstream project was archived"; # Added 2025-06-10
+  yacas-gui = throw "'yacas-gui' has been removed, as it depended on qt5 webengine. Upstream is considering deprecation of the gui entirely, see https://github.com/grzegorzmazur/yacas/issues/361."; # Added 2026-02-11
   yafaray-core = throw "'yafaray-core' has been renamed to/replaced by 'libyafaray'"; # Converted to throw 2025-10-27
   yaml-cpp_0_3 = throw "yaml-cpp_0_3 has been removed, as it was unused"; # Added 2025-09-16
   yamlpath = throw "'yamlpath' has been removed because it has been marked as broken since at least November 2024."; # Added 2025-10-01

pkgs/top-level/all-packages.nix

@@ -11682,11 +11682,6 @@ with pkgs;
     lisp-compiler = ecl;
   };
 
-  yacas-gui = yacas.override {
-    enableGui = true;
-    enableJupyter = false;
-  };
-
   ### SCIENCE / MISC
 
   boinc-headless = boinc.override { headless = true; };